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See detailModern electrophysiological methods for brain-computer interfaces.
Grave de Peralta Menendez, Rolando; Noirhomme, Quentin ULg; Cincotti, Febo et al

in Computational Intelligence & Neuroscience (2007)

Modern electrophysiological studies in animals show that the spectrum of neural oscillations encoding relevant information is broader than previously thought and that many diverse areas are engaged for ... [more ▼]

Modern electrophysiological studies in animals show that the spectrum of neural oscillations encoding relevant information is broader than previously thought and that many diverse areas are engaged for very simple tasks. However, EEG-based brain-computer interfaces (BCI) still employ as control modality relatively slow brain rhythms or features derived from preselected frequencies and scalp locations. Here, we describe the strategy and the algorithms we have developed for the analysis of electrophysiological data and demonstrate their capacity to lead to faster accurate decisions based on linear classifiers. To illustrate this strategy, we analyzed two typical BCI tasks. (1) Mu-rhythm control of a cursor movement by a paraplegic patient. For this data, we show that although the patient received extensive training in mu-rhythm control, valuable information about movement imagination is present on the untrained high-frequency rhythms. This is the first demonstration of the importance of high-frequency rhythms in imagined limb movements. (2) Self-paced finger tapping task in three healthy subjects including the data set used in the BCI-2003 competition. We show that by selecting electrodes and frequency ranges based on their discriminative power, the classification rates can be systematically improved with respect to results published thus far. [less ▲]

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See detailTre pastiches montaliani di Fabio Pusterla
Benzoni, Pietro ULg

in Per leggere (2007), 12

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See detailNew spillway at the Esch-sur-Sûre dam in Luxembourg
Lazaro, Philippe; Toussin, Guy; Didier, Gilles et al

in Wasserwirtschaft (2007), 10

The 50-m high arch dam of Esch-sur-Sûre, built on the river Sûre between 1956 and 1957, is located 1.2 km upstream of the town of esch-sur-Sûre in the north west of Luxembourg. As the dam is not equipped ... [more ▼]

The 50-m high arch dam of Esch-sur-Sûre, built on the river Sûre between 1956 and 1957, is located 1.2 km upstream of the town of esch-sur-Sûre in the north west of Luxembourg. As the dam is not equipped with a surface spillway, the construction of a new one is considered necessary. The new spillway design with a discharge capacity of 400 m³/s consists in building two labyrinth weirs discharging into a spillway tunnel passing under the left dam abutment. [less ▲]

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See detail"Au-delà du principe de plaisir". Politique du désir et bataille de l'intelligence selon Bernard Stiegler
Cormann, Grégory ULg

in Matière & l'Esprit (La) (2007), 9

Ce bref article présente Mécréance et Discrédit. 3. L’esprit perdu du capitalisme de Bernard Stiegler. Cet ouvrage récent constitue une partie d’un programme philosophique original, commencé en 1994 avec ... [more ▼]

Ce bref article présente Mécréance et Discrédit. 3. L’esprit perdu du capitalisme de Bernard Stiegler. Cet ouvrage récent constitue une partie d’un programme philosophique original, commencé en 1994 avec La Technique et le Temps 1. Profondément inscrit au sein de la pensée française contemporaine, notamment phénoménologique et psychanalytique, il donne d’un même élan la possibilité de penser la situation politique et intellectuelle depuis 1968 sur la base de ce qui a longtemps constitué l’impensé de la philosophie, la technique – marquée aujourd’hui par un devenir technologique de vaste ampleur –, menace mais aussi support prothétique de toute institution humaine individuelle ou collective. Le diagnostic sévère d’un épuisement du désir et d’une perte générale de l’attention exige une clarification de ces deux concepts, en vue de leur repolitisation. Un souci particulier sera accordé à la question de l’éducation, en tant qu’elle est le cadre dans lequel chacun de nous est affronté, de façon privilégiée, à ce qui, en lui, est bête. [less ▲]

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See detailPredatory hoverflies select their oviposition site according to aphid host plant and aphid species
Almohamad, Raki; Verheggen, François ULg; Francis, Frédéric ULg et al

in Entomologia Experimentalis et Applicata (2007), 125(1), 13-21

The hoverfly Episyrphus balteatus De Geer (Diptera: Syrphidae) is an abundant and efficient aphid-specific predator. Several aphidophagous parasitoids and predators are known to respond positively to ... [more ▼]

The hoverfly Episyrphus balteatus De Geer (Diptera: Syrphidae) is an abundant and efficient aphid-specific predator. Several aphidophagous parasitoids and predators are known to respond positively to aphid-infested plants. Semiochemicals from the latter association usually mediate predator/parasitoid foraging behavior toward sites appropriate for offspring fitness. In this study, we investigated the effect of aphid host plant and aphid species on foraging and oviposition behavior of E. balteatus. Behavioral observations were conducted using the Noldus Observer v. 5.0, which allows observed insect behavior to be subdivided into different stages. Additionally, the influence of aphid species and aphid host plant on offspring fitness was tested in a second set of experiments. Acyrthosiphon pisum Harris and Megoura viciae Buckton were equally attractive for E. balteatus whereas Aphis fabae Scopoli (all Homoptera: Aphididae) were less attractive. These results were correlated with (i) the number of eggs laid, which was significantly higher for the two first aphid species, and (ii) the fitness of hoverfly larvae, pupae, and adults. Two solanaceous plant species, Solanum nigrum L. and Solanum tuberosum L. (Solanaceae), which were infested with Myzus persicae Sulzer (Homoptera: Aphididae), were also compared using the same approach. Discrimination between these two M. persicae host plants was observed, with S. tuberosum being preferred as an oviposition site by the predatory hoverfly. Larval and adult fitness was correlated with the behavioral observations. Our results demonstrated the importance of the prey-host plant association on the choice of the oviposition site by an aphid predator, which is here shown to be related to offspring fitness. [less ▲]

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See detailApproche cliniques de la fièvre inconnue chez le cheval
Sandersen, Charlotte ULg; Amory, Hélène ULg

in Bulletin des journées nationales des GTV (2007)

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See detailLes principales formations végétales
Ouédraogo, M.; Vermeulen, Cédric ULg; Cornélis, D.

in Delvingt, W.; Vermeulen, Cédric (Eds.) Nazinga (2007)

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See detailNeurophysiologie néonatale explicative et illustrée: 3° cycle
Battisti, Oreste ULg

Learning material (2007)

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See detailL’accompagnement professionnel face aux enjeux de qualité de services
Pirard, Florence ULg

in Brougère, G.; Vandenbroeck, M. (Eds.) Repenser l’éducation des jeunes enfants (2007)

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See detailLes relations contractuelles entre le secteur public et le secteur privé : développements récents
Durviaux, Ann-Lawrence ULg

in Ammannati, Laura; Durviaux, Ann-Lawrence; Jacqmain, Jean (Eds.) et al Le marché et l'État à l'heure de la mondialisation -Actes du 1er colloque David-Constant de la Faculté de droit de l'Université de Liège (2007)

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See detailFabrication, characterization, and modeling of strained SOI MOSFETs with very large effective mobility
Driussi, F.; Esseni, D.; Selmi, L. et al

in IEEE (Ed.) 37th European Solid State Device Research Conference (ESSDERC) (2007)

Strained silicon on insulators (sSOI) wafers with a supercritical thickness of 58 nm were produced using thin strain relaxed SiGe buffer layers, wafer bonding, selective etch back and epitaxial overgrowth ... [more ▼]

Strained silicon on insulators (sSOI) wafers with a supercritical thickness of 58 nm were produced using thin strain relaxed SiGe buffer layers, wafer bonding, selective etch back and epitaxial overgrowth. Raman spectroscopy revealed an homogeneous strain of 0.63 plusmn 0.03 % in the strained Si layer. Long channel n-type SOI-MOSFETs showed very large electron mobilities up to 1200 cm2/Vs in the strained Si devices. These values are more than two times larger than those of reference SOI n-MOSFETs. Mobility simulations with state of the art scattering models are then used to interpret the experiments. [less ▲]

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See detailSur la personne de quelques impératifs : le type πᾶς χώρει
Denizot, Camille ULg

in Revue de Philologie, de Littérature et d'Histoire Anciennes (2007), 81(1), 39-51

A second person imperative can be found in 21 utterances in Euripides and especially Aristophanes’ plays, although one would rather expect a third person imperative is expected. The traditional ... [more ▼]

A second person imperative can be found in 21 utterances in Euripides and especially Aristophanes’ plays, although one would rather expect a third person imperative is expected. The traditional explanation, a diachronic one, assumes that persons were not formerly distinct in the imperative. A synchronic explanation of this second person seems preferable, if πᾶς is not understood as a pronoun with a distributive meaning and the syntactic function of a subject. Indeed, when the imperative is a second person one, it is always addressed to the chorus, and πᾶς has a vocative function, in apposition to the addressee; when πᾶς is used without a substantive, it has probably a collective meaning (“whole”) and not a distributive one (“every”). [less ▲]

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See detailAmputation in diabetic patients.
Van Damme, Hendrik ULg; Limet, Raymond ULg

in Clinics in Podiatric Medicine & Surgery (2007), 24(3), 569-82

In diabetes-related amputations, the risk of nonhealing or infection of a wound and the need for revision are increased. Medical treatment before amputation should optimize general and local conditions ... [more ▼]

In diabetes-related amputations, the risk of nonhealing or infection of a wound and the need for revision are increased. Medical treatment before amputation should optimize general and local conditions including the regression of edema, the control of infection, and the optimization of glucoregulation. A major argument for foot-sparing surgery is the poor functional recovery after major limb amputation. Diabetic patients are frail, with an increased postoperative morbidity and mortality after major amputation. Factors detrimental to functional outcome are advanced age, end-stage renal disease, dementia, and above-knee amputation. A multidisciplinary approach is required to optimize the results of diabetes-related amputations. The authors discuss medical and technical aspects that may reduce the failure of minor or major diabetes-related amputations. [less ▲]

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See detailMitoc-Malu Galben: industrie osseuse et témoins esthétiques
Chirica, Vasile; Noiret, Pierre ULg

in Otte, Marcel; Chirica, Vasile; Haesaerts, Paul (Eds.) L'Aurignacien et le Gravettien de Mitoc-Malu Galben (Moldavie roumaine) (2007)

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See detailMitoc-Malu Galben: étude de l'industrie lithique
Otte, Marcel ULg; Noiret, Pierre ULg; Chirica, Vasile et al

in Otte, Marcel; Chirica, Vasile; Haesaerts, Paul (Eds.) L'Aurignacien et le Gravettien de Mitoc-Malu Galben (Moldavie roumaine) (2007)

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See detailExperimental models/cell model: organotypic cultures
Jacobs, Nathalie ULg; Delvenne, Philippe ULg

Conference (2007)

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See detailEpithelial-mesenchymal transition process in human embryonic stem cells cultured in feeder-free conditions.
Ullmann, U.; In'T Veld, P.; Gilles, Christine ULg et al

in Molecular Human Reproduction (2007), 13(1), 21-32

Feeder-free human embryonic stem cell (hESC) culture is associated with the presence of mesenchymal-like cells appearing at the periphery of the colonies. The aim of this study was to identify this early ... [more ▼]

Feeder-free human embryonic stem cell (hESC) culture is associated with the presence of mesenchymal-like cells appearing at the periphery of the colonies. The aim of this study was to identify this early differentiation process. Long-term feeder-free hESC cultures using matrigel and conditioned medium from mouse and from human origin revealed that the appearance of mesenchymal-like cells was similar regardless of the conditioned medium used. Standard characterization confirmed the preservation of hESC properties, but the feeder-free cultures could not be maintained longer than 37 passages. The early differentiation process was characterized in the short term after switching hESCs cultured on feeders to feeder-free conditions. Transmission electron microscopy showed an epithelium-like structure inside the hESC colonies, whereas the peripheral cells revealed the acquisition of a rather mesenchymal-like phenotype. Immunochemistry analysis showed that cells at the periphery of the colonies had a negative E-cadherin expression and a positive Vimentin expression, suggesting an epithelial–mesenchymal transition (EMT). Nuclear staining of ß-catenin, positive N-cadherin and negative Connexin 43 expression were also found in the mesenchymal-like cell population. After RT–PCR analysis, Slug and Snail, both EMT-related transcription factors, were detected as up-regulated in the mesenchymal-like cell population. Taken together, our data suggest that culturing hESCs in feeder-free conditions enhances an early differentiation process identified as an EMT. [less ▲]

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